Base64 кодировщик/декодировщик
Кодируйте текст в Base64 или декодируйте Base64 в текст. Автоматическое преобразование при вводе.
Learn More About Base64
Understand the inner workings of Base64 encoding and when to use it:
About Base64 Encoder/Decoder
Base64 encoding is a standard way to convert binary data into a text format that can be safely transmitted over text-based protocols. Our free online tool allows you to instantly encode plain text into Base64 format or decode Base64 strings back into readable text, all within your browser without sending data to any server.
How It Works
Base64 works by taking 3 bytes of binary data (24 bits) and dividing them into 4 chunks of 6 bits each. These 6-bit chunks are then mapped to a 64-character alphabet consisting of A-Z, a-z, 0-9, '+', and '/'. This ensures the resulting text contains only safe, printable characters.
Common Use Cases
- Embedding small images directly into HTML or CSS files to reduce HTTP requests
- Safely transmitting binary data like email attachments over text-only protocols
- Storing complex data structures or binary files in JSON or XML formats
- Obfuscating simple text strings (note: this is not encryption or secure)
Frequently Asked Questions
No. Base64 is an encoding scheme designed to ensure data integrity during transfer, not to secure it. Anyone can easily decode a Base64 string. Never use Base64 to hide sensitive information like passwords.
The '=' character is used for padding. Since Base64 processes data in 3-byte chunks, if the input data isn't a multiple of 3 bytes, one or two '=' signs are added to the end of the encoded string to make its length a multiple of 4 characters.
No. Our Base64 Encoder/Decoder runs entirely locally in your web browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security.